Dental brush



FIG. 1 is a perspective view of a dental brush showing my new design;

FIG. 2 is a left side elevational view, the opposite side being a mirror image thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front end elevational view thereof; and

FIG. 6 is a rear end elevational view thereof.

The broken line showing of a hand is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a dental brush, as shown and described. 